
Okay so shuji is in Japanese team (forgot the name) which is really famous, he's new famous player as jiu. So he got jealous of jiu's skills and looks. Japan has higher qualities of gaming and electronics compared to China. So it has gaming arcade more, as it has shown in chapter, but China doesn't have much gaming arcades, so shuji deliberately challenged jiu to play different game in arcade, bc shuji knows that game is only available in Japan. And Chinese don't know them, even if they do, they won't be able to play as well as Japanese. So shuji challenged jiu to play a game which requires fast hand speed, and that gaming machine had higher score which was shuji's. But what shuji didn't know was Jiu is reincarnated and before when she was hacker she used to be at Japan as well, so she's pro at all type of gaming at gaming arcade as well. So in this chapter, they both compete on this gaming machine, and as you can guess who'll win Hehe.
Hope this will help you understand, if not feel free to ask.

In previous life, jiu was hacker and on top of that hackers have things that they can't tell to ppl, so she used to be alone, except she had 2 friends, one died but another was hoshino. Hoshino is as smart as jiu and was partner in her hacking thing. So only hoshino in her past life knew that she was a girl and a hacker as well. He used to assist her in every mission of hacking. In novel, it was said hoshino knew jiu so well if he just saw her hand speed or the devilish smile she gives, he would recognize her right away, regardless of gender or her crossdressing or different looks.
bro im so confused what even just happened this chapter?